hnb-test: attempt to reply to an MM Identity Request
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@ -18,8 +18,6 @@ void ranap_msg_dt_print(void *ctx, ranap_message *ranap_msg)
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printf("rx DirectTransfer: presence = %hx\n", ranap_msg->msg.directTransferIEs.presenceMask);
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PP(ranap_msg->msg.directTransferIEs.nas_pdu);
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// nas_pdu == '05 08 12' ==> IMEI Identity request
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// '05 04 0d' ==> LU reject
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/*
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typedef struct RANAP_DirectTransferIEs_s {
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uint16_t presenceMask;
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@ -44,5 +42,6 @@ void ranap_msg_dt_get(void *ctx, ranap_message *ranap_msg)
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int len = ranap_msg->msg.directTransferIEs.nas_pdu.size;
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char *data = ranap_msg->msg.directTransferIEs.nas_pdu.buf;
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m->l3h = m->data;
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memcpy(msgb_put(m, len), data, len);
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}
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@ -58,6 +58,12 @@
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#include <osmocom/rua/RUA_RUA-PDU.h>
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#include <osmocom/gsm/protocol/gsm_04_08.h>
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#include <osmocom/ranap/RANAP_ProcedureCode.h>
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#include <osmocom/ranap/RANAP_Criticality.h>
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#include <osmocom/ranap/RANAP_DirectTransfer.h>
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static void *tall_hnb_ctx;
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struct hnb_test g_hnb_test = {
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@ -175,6 +181,93 @@ static int hnb_test_rx_ue_register_acc(struct hnb_test *hnb, ANY_t *in)
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return 0;
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}
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static struct msgb *gen_nas_id_resp()
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{
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uint8_t id_resp[] = {
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0x05, /* MM discr */
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0x19, /* DTAP */
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/* IMEISV */
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0x09, /* len */
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0x03, /* first digit (0000) + even (0) + id IMEISV (011) */
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0x31, 0x91, 0x06, 0x00, 0x28, 0x47, 0x11, /* digits */
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0xf2, /* filler (1111) + last digit (0010) */
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};
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return ranap_generate_initiating_message(RANAP_ProcedureCode_id_DirectTransfer,
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RANAP_Criticality_ignore,
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&asn_DEF_RANAP_DirectTransfer,
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&id_resp);
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}
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static int hnb_test_nas_tx_id_resp(struct hnb_test *hnb)
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{
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struct hnbtest_chan *chan;
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struct msgb *txm, *rua;
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chan = hnb->cs.chan;
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if (!chan) {
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printf("hnb_test_nas_tx_id_resp(): No CS channel established yet.\n");
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return -1;
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}
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txm = gen_nas_id_resp();
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rua = rua_new_dt(chan->is_ps, chan->conn_id, txm);
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osmo_wqueue_enqueue(&g_hnb_test.wqueue, rua);
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return 0;
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}
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static int hnb_test_nas_rx_mm(struct hnb_test *hnb, struct msgb *rxm)
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{
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struct hnbtest_chan *chan;
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chan = hnb->cs.chan;
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if (!chan) {
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printf("hnb_test_nas_rx_mm(): No CS channel established yet.\n");
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return -1;
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}
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OSMO_ASSERT(!chan->is_ps);
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struct gsm48_hdr *gh = msgb_l3(rxm);
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uint8_t msg_type = gh->msg_type & 0xbf;
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switch (msg_type) {
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case GSM48_MT_MM_ID_REQ:
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return hnb_test_nas_tx_id_resp(hnb);
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default:
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printf("04.08 message type not handled by hnb-test: %d\n",
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msg_type);
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return 0;
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}
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}
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static int hnb_test_nas_rx_dtap(struct hnb_test *hnb, struct msgb *msg)
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{
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printf("got %s\n", osmo_hexdump(msg->data, msg->len));
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// nas_pdu == '05 08 12' ==> IMEI Identity request
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// '05 04 0d' ==> LU reject
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struct gsm48_hdr *gh = msgb_l3(msg);
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uint8_t pdisc = gh->proto_discr & 0x0f;
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switch (pdisc) {
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case GSM48_PDISC_MM:
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return hnb_test_nas_rx_mm(hnb, msg);
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default:
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printf("04.08 discriminator not handled by hnb-test: %d\n",
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pdisc);
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return 0;
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}
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}
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int hnb_test_hnbap_rx(struct hnb_test *hnb, struct msgb *msg)
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{
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HNBAP_PDU_t _pdu, *pdu = &_pdu;
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@ -255,9 +348,8 @@ int hnb_test_rua_rx(struct hnb_test *hnb, struct msgb *msg)
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struct msgb *m = msgb_alloc(1500, "direct_transfer_nas_pdu");
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direct_transfer_nas_pdu_get(&pdu->choice.successfulOutcome.value, m);
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// evaluate
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hnb_test_nas_rx_dtap(hnb, m);
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printf("got %s\n", osmo_hexdump(m->data, m->len));
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msgb_free(m);
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}
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break;
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@ -544,12 +636,6 @@ static struct cmd_node chan_node = {
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};
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struct hnbtest_chan {
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int is_ps;
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uint32_t conn_id;
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char *imsi;
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};
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static struct msgb *gen_initue_lu(int is_ps, uint32_t conn_id, const char *imsi)
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{
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uint8_t lu[] = { 0x05, 0x08, 0x70, 0x62, 0xf2, 0x30, 0xff, 0xf3, 0x57,
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@ -562,7 +648,6 @@ static struct msgb *gen_initue_lu(int is_ps, uint32_t conn_id, const char *imsi)
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.pLMNidentity.buf = plmn_id,
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.pLMNidentity.size = sizeof(plmn_id),
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};
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struct msgb *msg;
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/* FIXME: patch imsi */
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/* Note: the Mobile Identitiy IE's IMSI data has the identity type and
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@ -609,6 +694,10 @@ DEFUN(chan, chan_cmd,
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vty->index = chan;
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vty->node = CHAN_NODE;
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if (!chan->is_ps)
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g_hnb_test.cs.chan = chan;
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return CMD_SUCCESS;
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}
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@ -42,6 +42,12 @@ struct ue_context {
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char imsi[16+1];
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};
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struct hnbtest_chan {
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int is_ps;
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uint32_t conn_id;
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char *imsi;
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};
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struct hnb_test {
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uint16_t gw_port;
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/*! SCTP listen socket for incoming connections */
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@ -64,6 +70,10 @@ struct hnb_test {
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uint32_t ctx_id;
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int ues;
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struct {
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struct hnbtest_chan *chan;
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} cs;
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};
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extern struct hnb_test g_hnb_test;
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